Fatal error: Uncaught Error: Class "Text_Diff_Renderer_inline" not found in /usr/home/instytutoka/domains/laser2rt.pl/public_html/wp-includes/class-wp-text-diff-renderer-inline.php:16
Stack trace:
#0 {main}
  thrown in /usr/home/instytutoka/domains/laser2rt.pl/public_html/wp-includes/class-wp-text-diff-renderer-inline.php on line 16